Outdoor dry-type voltage transformer for electric locomotive

Abstract

The invention relates to an outdoor dry-type voltage transformer used for an electric locomotive, which comprises a main body which is composed of an iron core, a primary winding which is sheathed on the iron core, and a secondary winding, a primary wire connecting terminal, a secondary wire connecting terminal, a primary high-voltage insulation column which is sheathed outside of the primary wire connecting terminal, and a base, wherein the main body, the primary wire connecting terminal, the secondary wire connecting terminal and the primary high-voltage insulation column are fixedly installed on the base after forming a whole structure through adopting epoxide resin and silicon rubber for the composite insulation, wherein the primary high-voltage insulation column and the main body arein a cylindrical shape or an ellipsoidal shape, and the connection between the primary high-voltage insulation column and the main body is a spherical surface whose both sides are cut obliquely. The outdoor dry-type voltage transformer can prevent leaking oil and generating pollution flashover faults, and the invention has the advantages of stable insulation, fuse protection, long service life, small volume, convenient fixing, high mechanical strength, and wide application.

Description

technical field [0001] The invention relates to a voltage measuring device, in particular to an outdoor dry-type voltage transformer for electric locomotives. Background technique [0002] The outdoor voltage transformer is the equipment for measuring voltage, real-time monitoring or relay protection in the electric locomotive system. At present, the outdoor voltage transformer used on the roof of the electric locomotive is oil-immersed, using oil-paper insulation and magnetic bottle insulation. Due to the relatively harsh outdoor dynamic operating environment, the voltage transformer often leaks oil, and the oil quality deteriorates. The magnetic bottle is easy to accumulate dirt and cause pollution flashover voltage, which requires frequent maintenance and repair work; in addition, the product is heavy and bulky. Inconvenient installation and low service life have always been problems for electric locomotive maintenance personnel, and they are also urgent problems to be so...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of the existing outdoor oil-immersed voltage transformers of electric locomotives such as easy oil leakage, oil quality deterioration, easy pollution flashover, low service life, complicated maintenance, repair and installation, the purpose of the present invention is to provide a method for preventing oil Outdoor dry-type voltage transformers for electric locomotives with leakage, long maintenance period, pollution flashover resistance, and small size

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